1. Family: Poaceae Barnhart
    1. Hilaria Kunth

      1. This genus is accepted, and its native range is W. & Central U.S.A. to Guatemala.

    [GB]

    nonem

    Habit
    Annual (1), or perennial (9). Rhizomes absent (7), or short (2), or elongated (1). Stolons absent (4), or present (6). Culms erect (9), or geniculately ascending (1), or decumbent (1); slender (1/1); 5-35.5-100 cm long; rooting from lower nodes (1/1). Lateral branches ample (1/1). Ligule an eciliate membrane (9), or a ciliolate membrane (1). Leaf-blades herbaceous (9), or coriaceous (1); stiff (4), or firm (6). Leaf-blade apex muticous (9), or pungent (1).
    Inflorescences
    Inflorescence composed of racemes. Racemes borne along a central axis; in a multilateral false spike; oblong (3), or cuneate (7); unilateral; bearing a triad of spikelets. Central inflorescence axis unspecialized (8), or flattened (2). Rhachis obsolete; deciduous from axis. Spikelets in threes. Fertile spikelets sessile (9), or pedicelled (1); 1 in the cluster. Companion sterile spikelets sessile (9), or pedicelled (1); 2 in the cluster.
    Spikelets
    Companion sterile spikelets well-developed; deciduous with the fertile. Companion sterile spikelet glumes muticous (5), or mucronate (1), or awned (4). Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate (1), or oblong (9); laterally compressed; 3-6.3-12 mm long; falling entire; deciduous with accessory branch structures.
    Sterile
    Companion sterile spikelets well-developed; deciduous with the fertile. Companion sterile spikelet glumes muticous (5), or mucronate (1), or awned (4).
    Fertile
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate (1), or oblong (9); laterally compressed; 3-6.3-12 mm long; falling entire; deciduous with accessory branch structures.
    Glume
    Glumes free (3), or connate along margins below (7); shorter than spikelet; similar to fertile lemma in texture (5), or firmer than fertile lemma (5). Lower glume lanceolate (1), or oblong (8), or ovate (1); 0.5-0.6667-1 length of upper glume; membranous (2), or chartaceous (1), or coriaceous (7); 1-keeled; 3 -veined (1), or 7 -veined (9). Lower glume surface smooth (6), or scabrous (3), or tuberculate (1); glabrous (9), or pubescent (1). Lower glume apex lobed; 2 -fid (8), or 3 -fid (1), or 5 -fid (2); truncate (1/1), or obtuse (1/1); awned. Upper glume lanceolate (1), or oblong (8), or ovate (1); 0.6-0.7958-1 length of adjacent fertile lemma; membranous (2), or chartaceous (1), or coriaceous (7); with undifferentiated margins (9), or membranous margins (1); 1-keeled; 5 -veined (1), or 7 -veined (9). Upper glume primary vein eciliate (9), or ciliate (1). Upper glume surface smooth (6), or scabrous (3), or tuberculate (1); glabrous (9), or puberulous (1). Upper glume apex lobed; 2 -fid (8), or 3 -fid (1), or 5 -fid (2); truncate (1/1), or obtuse (1/1); awned; 1 -awned (7), or 2-3 -awned (2), or 7 -awned (2). Upper glume awn terminal (9), or dorsal (2).
    Florets
    Fertile florets bisexual (4), or female (6). Fertile lemma lanceolate (3), or ovate (7); laterally compressed; membranous (1), or cartilaginous (9); keeled; 3 -veined. Lemma apex entire (7), or dentate (2), or lobed (1); 2 -fid (3/3); incised 0.25 of lemma length; obtuse (2), or acute (1), or caudate (7); muticous (7), or mucronate (1), or awned (3); 1 -awned (3/3). Principal lemma awn from a sinus (3/3).
    Flowers
    Lodicules 2 (3/3). Anthers 3.
    Fruits
    Embryo 1 length of caryopsis.
    Distribution
    North America, or South America (1).

    Images

    Distribution

    Native to:

    Arizona, California, Colorado, Guatemala, Kansas, Mexico Central, Mexico Gulf, Mexico Northeast, Mexico Northwest, Mexico Southeast, Mexico Southwest, Nevada, New Mexico, Oklahoma, Texas, Utah, Wyoming

    Hilaria Kunth appears in other Kew resources:

    First published in F.W.H.von Humboldt, A.J.A.Bonpland & C.S.Kunth, Nov. Gen. Sp. 1: 116 (1816)

    Accepted by

    • Govaerts, R.H.A. (2011). World checklist of selected plant families published update Facilitated by the Trustees of the Royal Botanic Gardens, Kew.

    Sources

    GrassBase - The Online World Grass Flora
    http://creativecommons.org/licenses/by-nc-sa/3.0

    Kew Backbone Distributions
    The International Plant Names Index and World Checklist of Selected Plant Families 2018. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
    © Copyright 2017 World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

    Kew Names and Taxonomic Backbone
    The International Plant Names Index and World Checklist of Selected Plant Families 2018. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
    © Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0